CN103148031B - Energy-saving control system of hydraulic movable arm loop - Google Patents

Energy-saving control system of hydraulic movable arm loop Download PDF

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Publication number
CN103148031B
CN103148031B CN201310101850.6A CN201310101850A CN103148031B CN 103148031 B CN103148031 B CN 103148031B CN 201310101850 A CN201310101850 A CN 201310101850A CN 103148031 B CN103148031 B CN 103148031B
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China
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hydraulic
way valve
oil
oil hydraulic
fluid port
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CN201310101850.6A
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Chinese (zh)
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CN103148031A (en
Inventor
袁祖强
袁峰峰
殷晨波
高俊庭
叶仪
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南京工业大学
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Abstract

The invention discloses an energy-saving control system of a hydraulic movable arm loop, which comprises a first oil tank, a first hydraulic pump, a first multi-way valve, a hydraulic cylinder, a hydraulic motor, an electric generator, a storage battery, a second oil tank, a motor and a second hydraulic pump connected with the second oil tank. When a hydraulic rod of the hydraulic cylinder is retracted, hydraulic oil in a rodless cavity of the hydraulic cylinder charges and stores energy for the storage battery through the hydraulic motor, and when the hydraulic rod stretches out, the storage battery is connected with the motor, and hydraulic oil in the second oil tank is charged into the rodless cavity of the hydraulic cylinder. The energy-saving control system has the advantages that the running state of the loop is monitored in real time through a sensor, energy is efficiently recycled, the recycled energy is effectively utilized, and the energy-saving effect is good.

Description

A kind of hydraulic movable arm loop energy-saving control system

Technical field

The present invention relates to the hydraulic system of Construction Machinery Energy Saving technical field, particularly a kind of hydraulic movable arm loop energy-saving control system that can be applied to multiple hydraulic machinery field.

Background technique

Current various hydraulic component is very extensive in the application of engineering machinery field, and wherein particularly extensive with the use of hydraulic movable arm, hydraulic movable arm realizes the work of engineering machinery with hydraulic driving to-and-fro motion.

At present in engineering machinery field, excavator is widely used, but the capacity usage ratio of hydraulic shovel is lower, in two processes of stretching out and regaining of hydraulic movable arm, all need oil hydraulic pump to drive, hydraulic movable arm gravitational potential energy can not get high efficiente callback, most hydraulic energy consumption is on the restriction of multi-way valve, some is converted into heat energy, makes element heating, very easily damages.

Summary of the invention

Goal of the invention: technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of hydraulic movable arm loop energy-saving control system.

In order to solve the problems of the technologies described above, the invention discloses a kind of hydraulic movable arm loop energy-saving control system, comprise the first fuel tank, the first oil hydraulic pump, the first multi-way valve, oil hydraulic cylinder, oil hydraulic motor, generator, storage battery, the second fuel tank, motor and connect the second oil hydraulic pump of the second fuel tank; Described first fuel tank comprises oil outlet and return opening; First multi-way valve comprises the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port totally four hydraulic fluid ports; Oil hydraulic cylinder comprises rod chamber, rodless cavity and hydraulic rod; The oil outlet of the first fuel tank connects the first hydraulic fluid port of the first oil hydraulic pump and the first multi-way valve successively by pipeline, the second hydraulic fluid port of the first fuel tank connects the second hydraulic fluid port of the first multi-way valve by pipeline simultaneously; 3rd hydraulic fluid port of the first multi-way valve passes through the rod chamber of pipeline connecting fluid cylinder pressure; The rodless cavity of oil hydraulic cylinder is by the 3rd hydraulic fluid port of the pipeline connecting fluid pressure motor and the first multi-way valve that are provided with the first one-way valve; 4th hydraulic fluid port of the first multi-way valve passes through the rodless cavity of pipeline connecting fluid cylinder pressure; Oil hydraulic motor connects generator, and generator connects storage battery, and storage battery connects motor by a switch, and motor drives the second oil hydraulic pump; Second oil hydraulic pump is by the rodless cavity of pipeline connecting fluid cylinder pressure; When the hydraulic rod of oil hydraulic cylinder is regained, the hydraulic oil in the rodless cavity of oil hydraulic cylinder is charge in batteries energy storage by oil hydraulic motor, and when hydraulic rod stretches out, storage battery is connected with motor, is added in the rodless cavity of hydraulic rod by the hydraulic oil in the second oil cylinder.

In the present invention, the pipeline after the first one-way valve is provided with branch road and connects one second multi-way valve, and the second multi-way valve connects a bladder accumulator, and the second multi-way valve is controlled by controller.

In the present invention, the first fuel tank comprises bypassing safety hydraulic fluid port, and the pipeline that the first oil hydraulic pump is connected with the first hydraulic fluid port of the first multi-way valve is provided with the first bypass duct connecting bypassing safety hydraulic fluid port, and the first bypass duct is provided with the first relief valve.

In the present invention, comprise the second relief valve, the pipeline that the 3rd hydraulic fluid port of the first multi-way valve is connected with the rod chamber of oil hydraulic cylinder is provided with the second bypass duct connecting described first fuel tank, and the second bypass duct is provided with the second relief valve.

In the present invention, the pipeline that the 4th hydraulic fluid port of the first multi-way valve is connected with the rodless cavity of oil hydraulic cylinder is provided with the second one-way valve.

In the present invention, the pipeline that the second oil hydraulic pump is connected with the rodless cavity of oil hydraulic cylinder is provided with the 3rd one-way valve and hydrostatic sensor.

In the present invention, the hydraulic rod of oil hydraulic cylinder is provided with velocity transducer and pressure transducer.

In the present invention, comprise a controller, connect the switch of described first multi-way valve, hydrostatic sensor, velocity transducer, pressure transducer and storage battery respectively.In the present invention, all multi-way valve can adopt electromagnetic valve structure.

In the present invention, the 3rd hydraulic fluid port of oil hydraulic motor and the first multi-way valve is provided with the 4th one-way valve.

In the present invention, storage battery is connected with a voltameter, and voltameter is connected with described controller.

In the present invention, the first fuel tank and the second fuel tank can merge into a fuel tank, also can be respective independently two fuel tanks.

The object of the invention is to adopt sensor to monitor the working condition of oil hydraulic circuit in real time, the work of each executive component effective is controlled by controller, reclaim the gravitational potential energy of swing arm, and be electric energy by transform gravitational energy, the release of electric energy drives hydraulic pump works, the maximization realizing swing arm decline gravitational potential energy is reclaimed, and reaches energy-conservation effect.

Beneficial effect: advantage of the present invention is by the real-time monitoring loop running state of sensor, high efficiente callback energy, and effectively utilize the energy reclaimed, good energy-conserving effect.

Accompanying drawing explanation

To do the present invention below in conjunction with the drawings and specific embodiments and further illustrate, above-mentioned and/or otherwise advantage of the present invention will become apparent.

Fig. 1 is the hydraulic energy-saving control principle drawing of embodiment for hydraulic excavator movable arm loop.

Fig. 2 is embodiment's hydraulic movable arm decline schematic diagram.

Fig. 3 is embodiment's hydraulic movable arm rising principle figure.

Embodiment

The invention discloses a kind of hydraulic movable arm loop energy-saving control system, comprise the first fuel tank, the first oil hydraulic pump, the first multi-way valve, oil hydraulic cylinder, oil hydraulic motor, generator, storage battery, the second fuel tank, motor and connect the second oil hydraulic pump of the second fuel tank; Described first fuel tank comprises oil outlet and return opening; First multi-way valve comprises the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port totally four hydraulic fluid ports; Oil hydraulic cylinder comprises rod chamber, rodless cavity and hydraulic rod; The oil outlet of the first fuel tank connects the first hydraulic fluid port of the first oil hydraulic pump and the first multi-way valve successively by pipeline, the second hydraulic fluid port of the first fuel tank connects the second hydraulic fluid port of the first multi-way valve by pipeline simultaneously; 3rd hydraulic fluid port of the first multi-way valve passes through the rod chamber of pipeline connecting fluid cylinder pressure; The rodless cavity of oil hydraulic cylinder is by the 3rd hydraulic fluid port of the pipeline connecting fluid pressure motor and the first multi-way valve that are provided with the first one-way valve, and the inlet pipeline of the rodless cavity of oil hydraulic cylinder is provided with flow of pressurized gauge; 4th hydraulic fluid port of the first multi-way valve passes through the rodless cavity of pipeline connecting fluid cylinder pressure; Oil hydraulic motor connects generator, and generator connects storage battery, and storage battery connects motor by a switch, and motor drives the second oil hydraulic pump; Second oil hydraulic pump is by the rodless cavity of pipeline connecting fluid cylinder pressure; When the hydraulic rod of oil hydraulic cylinder is regained, the hydraulic oil in the rodless cavity of oil hydraulic cylinder is charge in batteries energy storage by oil hydraulic motor, and when hydraulic rod stretches out, storage battery is connected with motor, is added in the rodless cavity of hydraulic rod by the hydraulic oil in the second oil cylinder.Pipeline after first one-way valve is provided with branch road and connects one second multi-way valve, and the second multi-way valve connects a bladder accumulator.First fuel tank comprises bypassing safety hydraulic fluid port, and the pipeline that the first oil hydraulic pump is connected with the first hydraulic fluid port of the first multi-way valve is provided with the first bypass duct connecting bypassing safety hydraulic fluid port, and the first bypass duct is provided with the first relief valve.Comprise the second relief valve, the pipeline that the 3rd hydraulic fluid port of the first multi-way valve is connected with the rod chamber of oil hydraulic cylinder is provided with the second bypass duct connecting described first fuel tank, and the second bypass duct is provided with the second relief valve.The pipeline that 4th hydraulic fluid port of the first multi-way valve is connected with the rodless cavity of oil hydraulic cylinder is provided with the second one-way valve.The pipeline that second oil hydraulic pump is connected with the rodless cavity of oil hydraulic cylinder is provided with the 3rd one-way valve and hydrostatic sensor, pipeline between second oil hydraulic pump and the second oil cylinder is provided with the 4th one-way valve, second oil hydraulic pump and the 3rd one-way valve and between pipeline be provided with the 3rd bypass duct, the 3rd bypass duct is provided with the 3rd relief valve.The hydraulic rod of oil hydraulic cylinder is provided with velocity transducer and pressure transducer.Comprise a controller, connect the switch of described first multi-way valve, hydrostatic sensor, velocity transducer, pressure transducer and storage battery respectively.3rd hydraulic fluid port of oil hydraulic motor and the first multi-way valve is provided with the 4th one-way valve.Storage battery is connected with a voltameter, and voltameter is connected with described controller.

Specific embodiment

As shown in Figure 1, present embodiment discloses a kind of hydraulic excavator movable arm loop energy-saving control system, comprise oil hydraulic pump 2,14, multi-way valve 3,10, oil hydraulic cylinder 5, bladder accumulator 9, oil hydraulic motor 19 and other hydraulic control component and executive component.Have velocity transducer 6 pairs of swing arm rate of descent in the controls to detect, displacement transducer 7 pairs of swing arm decline displacements detect, and pressure transducer 11 pairs of oil hydraulic pump 14 delivery pressures detect.

There is controller 8, the signal that controller 8 receiving sensor 6,7,11 is sent in loop, export the signal after calculation process, and the signal of output is delivered to multi-way valve 3,10, ensure the normal operation in loop.

Fuel tank 1 comprises oil outlet 1b, return opening 1a, 1d and bypassing safety hydraulic fluid port 1c.Described oil hydraulic pump 2 is main hydraulic control components, and by motoring, entrance is connected with fuel tank 1b mouth, exports and is connected with the 3T mouth of multi-way valve 3, the entrance of relief valve 17, and the outlet of relief valve 17 connects the bypassing safety hydraulic fluid port 1c of fuel tank 1.When changing the restriction size of multi-way valve 3, the discharge capacity of oil hydraulic pump 2 can be changed, reach the effect of throttling.

Described multi-way valve 3 is solenoid directional control valves of a 3-position 4-way, comprises 3A, 3B, 3P, 3T tetra-hydraulic fluid ports.The hydraulic fluid port 3P of multi-way valve 3 connects return opening 1a.O type Median Function, a throttle valve is contained in its right position, and this throttle valve sensor 11 that is stressed controls, and can change restriction size, thus change the discharge capacity of oil hydraulic pump 2, play the benefit that throttling is energy-conservation when swing arm rises.

Relief valve 4 entrance in loop is connected with the rod chamber 5b of oil hydraulic cylinder 5, outlet is connected with fuel tank 1 return opening 1d, the oil circuit of system connects relief valve, cause oil return resistance, form back pressure, back pressure can improve the robust motion of executive component, magnitude of back pressure can as required regulation relief valve set pressure obtain.

Velocity transducer 6 is connected with displacement transducer 7, speed during control swing arm hydraulic cylinder works and displacement, occur when velocity transducer 6 detects that swing arm declines slow or quit work time, send signal to controller 8, controller 8 outputs signal to multi-way valve 10 after calculation process, make multi-way valve 10 right position work, 10P and 10A mouth is communicated with, and hydraulic oil reclaims potential energy to bladder accumulator 9 through flowmeter 21, one-way valve 22.At the end of displacement transducer 7 detects that swing arm declines, send signal to controller 8, controller 8 outputs signal to multi-way valve 3 after calculation process, multi-way valve 3 right position work, and 3T and 3B mouth is communicated with, 3P and 3A mouth is communicated with, swing arm starts to rise, and output signal to motor switch 23 with Time Controller 8, storage battery 26 is powered, oil hydraulic pump 14 works, and achieves the release of reclaiming potential energy here.

Bladder accumulator 9 is connected with multi-way valve 10, realize the recovery of movable arm potential energy, when after multi-way valve 10 right position work, 10P and 10A mouth is communicated with, gravitational potential energy enters bladder accumulator 9, temporarily stores, after swing arm decline terminates, bladder accumulator 9 continues to drive oil hydraulic motor 19 to work by multi-way valve 10, and the maximization realizing decline potential energy is reclaimed.

Oil hydraulic pump 19 entrance is by one-way valve 22, flowmeter 21 is connected with the rodless cavity 5c of oil hydraulic cylinder 5, outlet is connected with the 3A mouth of multi-way valve 3 by one-way valve 18, when swing arm declines, in oil hydraulic cylinder 5 rodless cavity 5c, hydraulic oil oil return drives oil hydraulic motor 19 to work, the hydraulic energy reclaimed is passed through generator 24, transducer 28 converts electrical power storage in storage battery 26, after voltameter 27 detects that storage battery 26 charges, send signal to controller 8, controller 8 outputs signal to electrically switchable grating 23, storage battery 26 starts electric discharge, motor 25 works, oil hydraulic pump 14 works, oil hydraulic pump 14 enters the rodless cavity 5c of oil hydraulic cylinder 5 from the oil outlet 16a inhalant liquid force feed of fuel tank 16 by one-way valve 15, promote piston, swing arm is made to increase.

Relief valve 13 entrance exports with oil hydraulic pump 14 and is connected, and exports and is connected with the return opening 16b of fuel tank 16, and in variable pump systems, relief valve is used for the maximum pressure of restriction system, plays overload protection.

Pressure transducer 11 is connected with one-way valve 12, the entrance of one-way valve 12 receives again the outlet of oil hydraulic pump 14, the delivery pressure of oil hydraulic pump 14 is detected, outputed signal by controller 8 and control multi-way valve 3 restriction aperture size, the flow of hydraulic control pump 2, after electricity release in storage battery 26, the restriction aperture of multi-way valve 3 is maximum, the main drive source that oil hydraulic pump 2 rises as swing arm.

One-way valve 20 exports the rodless cavity 5c linking oil hydraulic cylinder 5 with flowmeter 21, and entrance is connected with the 3B mouth of multi-way valve 3, the one-way flow of hydraulic control oil.

One-way valve 15 entrance is connected with the oil outlet 16a of fuel tank 16, exports and is connected with oil hydraulic pump 14 entrance, and when oil hydraulic pump 14 works, hydraulic oil is by one-way valve 15 inhalant liquid press pump 14.

One-way valve 18 entrance exports with oil hydraulic motor 19 and is connected, outlet is connected with the rod chamber 5b of oil hydraulic cylinder 5, when swing arm declines, after the hydraulic oil that oil hydraulic cylinder 5 rodless cavity 5c discharges flows through flowmeter 21, one-way valve 22 enters oil hydraulic pump 19, the rod chamber 5b of oil hydraulic cylinder 5 is got back to by one-way valve 18, like this when motor is in the slow-speed of revolution and oil hydraulic pump low discharge, can prevent excavator swing arm from making because Action of Gravity Field declines rapidly oil hydraulic cylinder 5 rod chamber 5b produce and inhale sky, achieve the regeneration of flow.

Multi-way valve 10 is bi-bit bi-pass solenoid directional control valves, 10A mouth is connected with bladder accumulator 9,10P mouth is connected with the entrance of oil hydraulic motor 19, after controller 8 outputs signal to multi-way valve 10, multi-way valve 10 right position work, 10P and 10A mouth is connected, and gravitational potential energy is temporarily stored in bladder accumulator 9, achieves the recovery of energy.

In the present embodiment, fuel tank 1 and 16 also can adopt the design of a fuel tank.

Below concrete action and the Energy Saving Control process prescription of oil hydraulic circuit.

As shown in Figure 2, during descending movable arm of excavator, multi-way valve 3 left position work, 3T and 3A mouth is communicated with, 3P and 3B mouth is communicated with, hydraulic oil flows into the rod chamber 5b of oil hydraulic cylinder 5 through oil hydraulic pump 2 to the 3T mouth of multi-way valve 3 from fuel tank 1 oil outlet 1b, hydraulic oil in oil hydraulic cylinder 5 rodless cavity 5c flows into oil hydraulic motor 19 through flowmeter 21, one-way valve 22, oil hydraulic motor 19 is started working, the gravitational potential energy of swing arm is converted to electrical power storage in storage battery 26 by generator 24, transducer 28, achieve the recovery of gravitational potential energy, as the power source driving oil hydraulic pump 14.Enter the rod chamber 5b of oil hydraulic cylinder 5 after part fluid flows through oil hydraulic motor 19 from one-way valve 18, realize flow regeneration.In swing arm decline process, discharge capacity due to motor is limited, if oil return can not be discharged in time, swing arm will be caused to decline even stop slowly, cause working normally, therefore when velocity transducer 6 detects that swing arm declined slowly or stopped, transmit a signal to controller 8, controller 8 outputs signal to multi-way valve 10 after calculation process, multi-way valve 10 right position work, 10P and 10A mouth is communicated with, hydraulic oil from oil hydraulic cylinder 5 rodless cavity 5c out after through overcurrent gauge 21, one-way valve 22, multi-way valve 10 enters into bladder accumulator 9 and temporarily stores, after swing arm oil hydraulic cylinder 5 underpressure or decline terminate, bladder accumulator continues to drive oil hydraulic motor 19 to operate, the maximization realizing decline potential energy is reclaimed.

As shown in Figure 3, after displacement transducer 7 detects that swing arm decline terminates, send signal to controller 8, controller 8 outputs signal to multi-way valve 3, multi-way valve 3 right position work, 3T and 3B mouth is communicated with, 3P and 3A mouth is communicated with, swing arm starts to rise, now the throttle valve opening of the right position of multi-way valve 3 is smaller, after voltameter 27 detects that storage battery 26 charges, send signal to controller 8, controller 8 outputs signal to motor switch 23 after calculation process, storage battery 26 discharges and drives oil hydraulic pump 14 to work, oil hydraulic pump 14 passes through one-way valve 15 by the hydraulic oil suction work in fuel tank 16, hydraulic oil flows through one-way valve 12, pressure transducer 11, flowmeter 21 enters the rodless cavity 5c of oil hydraulic cylinder 5, swing arm rises, when pressure transducer 11 detects that oil hydraulic pump 14 delivery pressure is not enough, send signal to controller 8, controller 8 outputs signal to multi-way valve 3 after calculation process, the restriction aperture of multi-way valve 3 is made to become large, at this moment oil hydraulic pump 2 is as major control element, hydraulic oil in fuel tank 1 is delivered to oil hydraulic cylinder 5 rodless cavity 5c through the 3T mouth of multi-way valve 3 through 3B mouth, driving swing arm rises.By reducing the discharge capacity of oil hydraulic pump 2 in process, reach energy-conservation object.

The invention provides a kind of hydraulic movable arm loop energy-saving control system; the method and access of this technological scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each constituent element not clear and definite in the present embodiment is realized.

Claims (1)

1. a hydraulic movable arm loop energy-saving control system, is characterized in that, comprises the first fuel tank, the first oil hydraulic pump, the first multi-way valve, oil hydraulic cylinder, oil hydraulic motor, generator, storage battery, the second fuel tank, motor and connect the second oil hydraulic pump of the second fuel tank;
Described first fuel tank comprises oil outlet and return opening; First multi-way valve comprises the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port totally four hydraulic fluid ports; Oil hydraulic cylinder comprises rod chamber, rodless cavity and hydraulic rod;
The oil outlet of the first fuel tank connects the first hydraulic fluid port of the first oil hydraulic pump and the first multi-way valve successively by pipeline, the return opening of the first fuel tank connects the second hydraulic fluid port of the first multi-way valve by pipeline simultaneously; 3rd hydraulic fluid port of the first multi-way valve passes through the rod chamber of pipeline connecting fluid cylinder pressure; The rodless cavity of oil hydraulic cylinder is by being provided with the pipeline connecting fluid pressure motor of the first one-way valve; 4th hydraulic fluid port of the first multi-way valve passes through the rodless cavity of pipeline connecting fluid cylinder pressure; Oil hydraulic motor connects generator, and generator connects storage battery, and storage battery connects motor by a switch, and motor drives the second oil hydraulic pump; Second oil hydraulic pump is by the rodless cavity of pipeline connecting fluid cylinder pressure;
When the hydraulic rod of oil hydraulic cylinder reclaims, hydraulic oil in the rodless cavity of oil hydraulic cylinder is charge in batteries energy storage by oil hydraulic motor, when hydraulic rod stretches out, storage battery is connected with motor, and the hydraulic oil in the second fuel tank adds in the rodless cavity of hydraulic rod by the second oil hydraulic pump;
Pipeline after first one-way valve is provided with branch road and connects one second multi-way valve, and the second multi-way valve connects a bladder accumulator; First fuel tank comprises bypassing safety hydraulic fluid port, and the pipeline that the first oil hydraulic pump is connected with the first hydraulic fluid port of the first multi-way valve is provided with the first bypass duct connecting bypassing safety hydraulic fluid port, and the first bypass duct is provided with the first relief valve;
Comprise the second relief valve, the pipeline that the 3rd hydraulic fluid port of the first multi-way valve is connected with the rod chamber of oil hydraulic cylinder is provided with the second bypass duct connecting described first fuel tank, and the second bypass duct is provided with the second relief valve;
The pipeline that 4th hydraulic fluid port of the first multi-way valve is connected with the rodless cavity of oil hydraulic cylinder is provided with the second one-way valve;
The pipeline that second oil hydraulic pump is connected with the rodless cavity of oil hydraulic cylinder is provided with the 3rd one-way valve and pressure transducer;
The hydraulic rod of oil hydraulic cylinder is provided with velocity transducer and displacement transducer;
Comprise a controller, connect the switch of described first multi-way valve, the second multi-way valve, displacement transducer, velocity transducer, pressure transducer and storage battery respectively;
3rd hydraulic fluid port connecting tube of oil hydraulic motor and the first multi-way valve is provided with the 4th one-way valve;
Storage battery is connected with a voltameter, and voltameter is connected with described controller.
CN201310101850.6A 2013-03-27 2013-03-27 Energy-saving control system of hydraulic movable arm loop CN103148031B (en)

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